题目内容

In time of great danger, we youth should stand in the ( ) .

A. front
B. gap
C. pit
D. gape

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Professor Baker told me that this bottle was ( ) as poison.

A. identify
B. labeled
C. signed
D. labored

John is good at his job but he seems to ( ) confidence.

A. lack
B. short
C. be short
D. lack in

If you live with a ( ) person, you will learn to limp.

A. lamb
B. lame
C. lamp
D. lam

生物质能是直接或间接地来源于植物的光和作用把转化为化学能蕴藏在生物质中的一种能量形式。

A. 太阳能
B. 风能
C. 地热能
D. 海洋能