I think he"s been drinking, _______ I"m not completely sure.A．ifB．thoughC．becaus

题型：不详难度：来源：

I think he"s been drinking, _______ I"m not completely sure.

A．if

B．though

C．because

D．while

答案

解析

试题分析：句意：我认为他一直在喝酒，虽然我不完全确定。If如果；though尽管，虽然；because因为；while在……期间。根据题意选B。

举一反三

______ she stood up, she dropped the necklace.

A．As

B．While

C．Before

D．Until

题型：不详难度：| 查看答案

—_________does Tom exercise? —Every day.

A．How often

B．How many

C．How long

D．How far

题型：不详难度：| 查看答案

Although he is very old, _________ he works very hard.

A．and

B．but

C．/

D．so

题型：不详难度：| 查看答案

David likes vegetables, _________ tomatoes, potatoes and cabbages.

A．of course

B．for example

C．and so on

D．such as

题型：不详难度：| 查看答案

It is _______easy work _____ we can finish it in a short time .

A．so; that

B．such; that

C．too; to

D．such an; that

题型：不详难度：| 查看答案