It was back home after the experiment.
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
is believed that improvement in health care will lead to a stronger , more prosperous economy .
A. As B. That C. This D. It
----May I smoke here ?
-----If you , choose a seat in the smoking section .
A. should B. could C. may D. must
I like getting up very early in summer. The morning air is so good .
A. to be breathed B. to breathe C. breathing D. being breathed
-----She looks very happy. She have passed the exam.
------I guess so. It’s not difficult after all.
A. should B. could C. must D. might
----Did Peter fix the computer himself?
-----He , because he does know much about computers.
A. has it fixed B. had fixed it C. had it fixed D. fixed it
