— Look! That’s Amy.
— It _______ be her. She’s gone to Xi’an.
| A．must | B．can | C．may | D．can’t |
I’m sorry I’m late again________ the heavy rain.
| A．as | B．so | C．because | D．because of |
______ regular exercise is very important, it’s not a good idea to exercise too close to bedtime.
| A．If | B．As | C．Although | D．Unless |
The box is ________ heavy ________ I can’t lift it.
| A．too, to | B．so, that |
| C．very, that | D．too, that |
We're not sure if it _______ tomorrow. If it _______, we won't go hiking.
| A．will rain; rains | B．will rain; will rain |
| C．rains; rains | D．rains; will rain |
If it ________ tomorrow, we will go to the zoo.
A. isn’t rain B. doesn’t rain C. won’t rain