--- What on earth are the police busy with?
--- They have been investigating how the train crash __________.
| A．came out | B．came across | C．came about | D．came up |
The fireworks last year _______ the beauty of Changchun over Chinese New Year.
| A．adds to | B．adds up | C．adds up to | D．added to |
When do you think ______ the job ?
| A．he will do | B．will he do | C．that he will do | D．what will he do |
I can hardly _______ my first English teacher in the market last Saturday.
| A．know | B．see | C．recognize | D．realize |
_______ is it _______ he talked about at the meeting?
| A．What/that | B．That/what | C．That/that | D．What/what |
Pandas are native ______ west China.
| A．on | B．to | C．from | D．of |