—How long have you been working as an assistant here?
—__________I finished middle school.
| A．Ever since | B．Before | C．After | D．When |
With so much water being used in the bathroom,it is no _____ that more environmentally friendly technologies have come out to make better use of water resources.
| A．surprise | B．need | C．question | D．doubt |
.Nothing but one desk and six chairs ________ in the room.
| A．are | B．is stayed | C．is | D．are left |
Tom has been out of work for two years, so he has difficulty______.
| A．earning living | B．earning his living | C．to earn livings | D．to earn his living |
The place _______interested me most was the Children's Palace.
| A．which | B．where | C．what | D．in which |
It was _____back home after the experiments.
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t go |