The road conditions there turned out to be very good, ______ was more than we could expect.
| A．it | B．what | C．which | D．that |
13.I think it a great honour_______to visit your country.
| A．to invite | B．inviting | C．having invited | D．to be invited |
14.Many people now make_________a rule to buy cards for their friends before Christmas.
| A．themselves | B．it | C．that | D．This |
15.__________is very clear to everyone that he's round and tall like a tree.
16.
| A．This | B．What | C．That | D．It |
17..In the United States, bus travel doesn't cost much as train travel, ?
18.
| A．don't they | B．does it | C．do they | D．doesn't it |
19..Someone is at the door, who is_________?
20.
| A．this | B．that | C．it | D．He |