---t’s a challenge, I guess, man against nature.
| A．of | B．for | C．by | D．about |
--- I'd have made a phone call to you, ___________ your telephone number．
--- That’s all right．What was up then?
| A．if I know | B．had I forgotten |
| C．if I hadn’t remembered | D．but I forgot |
The cousins are alike in age, but _____ they are as different as day and night．
| A．anyhow | B．besides | C．otherwise | D．moreover |
Is it a wonder that _____ little cells can store _____ much energy?
| A．such, so | B．so, much | C．so, so | D．such, such |
Not having worked out the problem, _____ leave the office．
| A．so he was not allowed to | B．and he didn’t want to |
| C．the teacher couldn’t make him | D．he couldn’t free himself to |
----Why isn’t Cathy here yet?
--- She _________ to be picked up at the station．
| A．could wait | B．must wait |
| C．might be waiting | D．can be waiting |