—ou___________ stop me．

       —Even if you __________it, I won't allow you to swim across the river．

       A．mustn't; dare not do               B．may ; dare not do

       C．can; dare to do                  D．needn't; dare do

Henry talks to his dog as if it______him.

A. understands  B. understood  C. understand   D. would understand

________ her faults, she’s Arnold’s mother. Don’t be so rude to her.

A. Whatever   B. What

C. Whichever  D. Whenever

_______ your diet, it is easy to reduce.

A. Watching   B. To be watching

C. If you watch      D. To have watched

The visitor asked to have his picture taken _______ stood the famous tower.

A. that    B. at which

C. when  D. where

 “Isn’t it about time you _____ to do morning exercises？” “Yes, it is. Would you like to join us？”

    A. begin                            B. have begun

C. began                            D. had begun

She can speak _______ in front of Mack, but she can’t eat ______ in his restaurant.

A. free, free    B. free, freely

C. freely, free D. freely, freely

Let’s make it at seven o’clock on Tuesday morning at my office if ________.

A. you’re convenient        B. it is convenient for you

C. you feel convenient       D. it is convenient with you

As she’s not here, I suppose she _____ home.

    A. must go                B. must have gone

C. might go               D. might be going

It is the protection for the trees _______ really matters, rather than how many trees are planted.

    A. what                     B. that

C. 不填                     D. which