____________ he exercises every day, _____________ he is very healthy.
A. Because; /
B. Because; so
C. Though; /
The first thing I’m going to do is to send an e-mail to Peter.
| A．which | B．who | C．that | D．why |
—The air pollution is so terrible.
--It will be worse we do something to protect the environment.
| A．if | B．unless | C．after | D．when |
We should do what we can our English.
| A．improve | B．improved |
| C．to improve | D．improving |
–Whose dictionary is this?
-- It be Jack’s. Here’s his name.
| A．must | B．mustn’t | C．can | D．can’t |
–You’re in a hurry. Where are you going?
--To the library. Tony for me there.
| A．waits | B．waited |
| C．is waiting | D．was waiting |