20. _________raining hard for 3 hours without stopping.
21.
| A．It is | B．It was | C．It has been | D．It had been |
—Did you look up the time of trains to Shanghai?
—Yes, the early train is ________ to leave at 5:00 am.
| A．likely | B．about | C．possible | D．due |
—______ you got to know my telephone number?
—Through a friend of yours.
| A．How was it | B．How was it that |
| C．Was it how that | D．How did |
Jack is good, kind, hard-working and intelligent. _____, I can't speak too highly of him.
| A．As a result | B．By the way | C．On the whole | D．In a word |
It isn't so much whether he works hard; the question is whether he works _____.
| A．above all | B．in all | C．at all | D．after all |
___ by the beauty of nature, the girl from London decided to spend another two days on the farm.
| A．Attracting | B．Attracted |
| C．To be attracted | D．Having attracted |