Only after Mary read her composition the second time __________ the spelling mistake.
| A．did she notice | B．she noticed |
| C．does she notice | D．she has noticed |
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 |
Rose is not only clever ____.
| A．and beautiful too | B．but also beautiful | C．but beautiful | D．B and C |