--Do you know ________ this dictionary belongs to?
--Let me see. Oh, it’s __________.
| A．who does, mine | B．who, me | C．whose, mine | D．who, mine |
--- Have you solved your problem?
---I've kept on thinking about that matter ______, but I have no idea yet now.
| A．at times | B．some time | C．at a time | D．all the time |
I am surprised to see you not smoking. You ______.
| A．are used to | B．were used to | C．used to | D．used to be |
--- The two old friends were ______ busy ______ with each other ______ the time.
--- Yes. They hadn’t met for long.
| A．too; to talk; to forget | B．too; talking; to forget |
| C．so; to talk; that they forgot | D．so; talking; that they forgot |
______ of the students in my class plan to go abroad for ______ study in the future.
| A．Two-thirds; farther | B．One-thirds; farther |
| C．Three-fourths; further | D．Three-fifth; further |
Sound travels ______ air ______ a speed of about 340 metres per second.
| A．over; in | B．through; at | C．by; at | D．through; over |