39. A ______ person or animal is very aggressive or angry.
| A．fierce | B．frightened | C．hot-temper | D．Tender |
—What time would it be ______ for me to come round?
— Any time will do as long as you are free
| A．convenient | B．fair | C．easy | D．comfortable |
They'll have a beer together______,talking about their separate life, but not often.
| A．by and by | B．now and then | C．all the time | D．more or less |
The twins are so much alike that no one can ________one from the other.
| A．distinguish | B．separate | C．identify | D．recognize |
When I walked past the street, seeing the children playing happily, their happy laughter _______memories of my childhood.
| A．called in | B．called for | C．called on | D．called up |
Although the old man is in his sixties, ___ he walks fairly fast.
| A．but | B．yet | C．therefore | D．however |