_____I had time to check what I had written in the exam, the bell rang.
| A．If | B．Before | C．Until | D．Since |
--Can I get tickets for the conert? --___,Sold out
| A．You can | B．Yes | C．All right | D．Sorry |
The doctor tried his best to save this patient.At last he began ___.
| A．to come | B．to come to life | C．to come up | D．to come up to |
He was sitting in an armchair, ___ a novel
| A．reading | B．read | C．was reading | D．to be reading |
Only then ___ that he had made a mistake.
| A．he realized | B．did he realized | C．realized he did | D．did he realize |
--Do you like to study mathematics?---____? I like it very much.
| A．No | B．Not | C．Why not | D．Not why |