If it ________ for the heavy rain then, we would have arrived here ahead of time.
18. My mother ____ for Beijing in a few days. I wonder when the earliest plane ____ on Monday?
17. On yesterday’s interview, he didn’t make a(an) ____ at all; what was the matter with him?
16..—Mr Smith, may I ask for a few days off? I am worn out. --____. We are too busy.
15. After retiring, he was recommended to ____ gardening as a hobby.
14. --I tried many times, but I still failed in the experiment. --Don’t be discouraged. ____ and the problem will be settled.