–Do you know what Mike does all day? –I know he spends at least as much time wa

题型：不详难度：来源：

–Do you know what Mike does all day?
–I know he spends at least as much time watching TV as he _____ his lessons.

A．is doing

B．does

C．spends in

D．does doing

答案

解析

略

举一反三

Jimmy needs to improve his technique if he __________ gold in the 2008 Olympics.

A．wins

B．is winning

C．is about to win

D．is to win

题型：不详难度：| 查看答案

You should make a careful plan ___ the experiment.

A．before to do

B．before doing

C．after to do

D．after doing

题型：不详难度：| 查看答案

There’s no point __ to persuade him to do anything.

A．to try

B．in trying

C．of trying

D．if you try

题型：不详难度：| 查看答案

The United States signed up on Friday for the 2010 Shanghai World Expo, _________ it the last major country to join the event．

A．making

B．made

C．to make

D．having made

题型：不详难度：| 查看答案

So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.

A．to have come about	B．to come about
C．coming about	D．to be coming about

题型：不详难度：| 查看答案