I have been living in Haikou for 10 years, but seldom______so lonely as now．
| A．have I felt | B．I have felt | C．had I felt | D．I had felt |
—Do you mind if I smoke here?
—_____．I’ve got a bit of cold these days．
| A．I’m afraid I do | B．Of course not |
| C．No trouble at all | D．Yes, just go ahead |
He finds it hard to keep _____ with the change of society if he stops learning．
| A．company | B．time | C．faith | D．pace |
If you don’t go there, ______．
| A．so will I | B．neither do I | C．so do I | D．neither will I |
She is already 18 years old, but she _____ as if she were still a little girl．
| A．believes | B．behaves |
| C．directs | D．declares |
The time has come ______ we can make extensive use of nuclear energy．
| A．when | B．which | C．since | D．while |