—What has made him look like lacking sleep?
—_______ his wife is ill and he has to get up several times a night to attend to her.
A．For B. Because C．That D．What
I don’t like ___ of the three books. Only one in particular has attracted my attention.
A. either B. both C. all D. Any
Look before you leap! You have to ______the costs of the new system against the benefits it will bring.
A. weigh B. match C. defend D. Fight
If you have a job, ________ yourself to it and finally you’ll succeed.
A. do devote B. don’t devote C. devoting D. not devoting
_________, so he is afraid of dogs .
A. Having been bitten twice B. Bitten twice
C. After he has been bitten twice D .He has been bitten twice
As is widely acknowledged, playing outside helps children learn through curiosity, which , _ __, promotes creativity.
A．in brief B．in turn C．in conclusion D．in return
