It was ten o’clock _____ he came back home.
| A．when | B．that |
| C．since | D．after |
We ______ last night, but we went to the concert instead．
| A．must have studied | B．might study |
| C．should have studied | D．would study |
In no way ______leave ______ little children alone．
| A．we must; so | B．must we; such | C．must we; so | D．we must; such |
. Sarah hopes to become a friend of ______ shares her interests.
| A．anyone | B．whomever | C．whoever | D．no matter who |
. — Excuse me, did you notice whether the No. 18 bus had gone by?
— Not ______ I began to stand here.
| A．as | B．since | C．when | D．while |
— Is that the middle school you often refer to?
— Right, just the one ______ you know I used to study for years.
| A．that | B．which | C．where | D．what |