解题步骤:

1. 冠词+形容词+名词
  Ex. a beautiful girl

2. 题目: A ________ opportunity never returns.

  (A) losing:
  形容词: 失败的; 导致失败的
  名词: 失败; 损失
  (B) lose
  动词: 丧失
  (C) loss
  名词: 失败; 遗失
  (D) lost
    (lose的过去式和过去分词)
    形容词:弄丢的, 遗失的

3. 答案选c;因为题意为: 错过的机会永不再来。

2.( ) Don't wake up the     chind. (A)sleep (B)sleeping (C)slept (D)is slept

解题:

1. 题型:考分词的用法

分词是具有形容词性质的动词型态，
可分成两种，即现在分词(Present Participle)，
简写为V-ing；过去分词(Past Participle)，简写为P.P.。

2. Don't wake up the sleeping child.   (不要唤醒这个正在睡觉的小孩。)
  要用现在分词,因为小孩正在睡觉

3.( ) The teacher answered the question     in class. (A)which asked (B)that were asked (C)was asked (D)asked

The teacher answered the question (which are asked) in class.
先去掉做主词的关系代名词(which)
把动词改为分词:
V-ing 表主动、进行
p.p 表被动、完成

因此答案选(D)
The teacher answered the question asked in class.

The sunlight     through the window wakes me up every morning. (A)that come (B)coming (C)that coming (D)comes

ans: B

5.(B ) He sat there ______ a novel. (A)read (B)reading (C)was reading (D)read

reading 当SC (主词补语)补充说明主词的动作,用现在分词表主动

6.(B ) What's making the lake     ? (A)be polluted (B)polluted (C)polluting (D)pollute
7.(A ) The rain kept us     for two hours. (A)wait (B)waiting (C)to wait (D)waited
8.(D ) Someone has left the water     . (A)to run (B)run (C)ran (D)running
9.(C ) You should have your hands     clean. (A)wash (B)washing (C)washed (D)to wash

1.( ) A     opportunity never returns. (A)losing (B)lose (C)loss (D)lost
D, 失去的，过去分词当形容词

2.( ) Don't wake up the     chind. (A)sleep (B)sleeping (C)slept (D)is slept
B, 现在分词当形容词，熟睡的

3.( ) The teacher answered the question     in class. (A)which asked (B)that were asked (C)was asked (D)asked
D, 省略了 which was

4.( ) The sunlight     through the window wakes me up every morning. (A)that come (B)coming (C)that coming (D)comes
B，省略了 that/which comes

5.( ) He sat there     a novel. (A)read (B)reading (C)was reading (D)read
B，主词一致、两个动作同时进行时，后面的动词通常可直接用 V-ing 表示

6.( ) What's making the lake     ? (A)be polluted (B)polluted (C)polluting (D)pollute
B，make O. OC. 受词补语，这里是过去分词当形容词

7.( ) The rain kept us     for two hours. (A)wait (B)waiting (C)to wait (D)waited
B，keep O. Oc，这里 wait 是主动，所以是现在分词当形容词

8.( ) Someone has left the water     . (A)to run (B)run (C)ran (D)running
D, 现在分词当形容词

9.( ) You should have your hands     clean. (A)wash (B)washing (C)washed (D)to wash
C, 过去分词当形容词