Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.
| A．pile up | B．build up | C．keep up | D．pull up |
When you get your paper back, pay special attention to ______ have been marked
| A．where | B．what | C．which | D．that |
They didn’t turn up at the meeting yesterday. Otherwise, they _________ the report.
| A．had listened to | B．would listen to |
| C．should listen to | D．would have listened to |
Johnson, to grasp the chance to become a doctor, decided to take up teaching.
| A．fails | B．failed | C．to fail | D．having failed |
Having been out of touch with his parents for two years, John returned home,
| A．safe and sound | B．safely and sound |
| C．safe and soundly | D．safely and soundly |
Written in a hurry, ______. How can it be satisfactory?
| A．they find many mistakes in the report |
| B．lots of mistakes have been made in the report |
| C．there are many mistakes in the report |
| D．the report is full of mistakes |