A tunnel was built under _____ was a lake a year ago.
| A．where | B．which | C．that | D．what |
My English teacher, as well as her students, ____ to perform at the party last night.
| A．were invited | B．was invited |
| C．have been invited | D．has been invited |
__________ something unexpected happens，I will meet you at the school gate tomorrow
morning.
| A．When | B．Unless | C．Since | D．If |
Career advisors often suggest people find a job _______ they can get a sense of achievement.
| A．that | B．what | C．where | D．which |
Washing hands thoroughly is one of the effective ways to avoid ________ by virus.
| A．being infected | B．infecting |
| C．to be infected | D．to infect |
Winter _________， but children can’t wait to go skiing.
| A．won’t arrive | B．didn’t arrive |
| C．hadn’t arrived | D．hasn’t arrived |