It ______ to me that I might try this way to deal with this problem.
| A．took place | B．burst | C．occurred | D．happened |
If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.
A. habit B. law C. rule D. custom
with the size of the whole earth, the highest mountain doesn't seem high at all.
| A．When compared | B．To compare |
| C．While comparing | D．It compared |
He___________ when the bus came to a sudden stop.
| A．was almost hurt | B．was to hurt himself |
| C．was hurt himself | D．was hurting himself |
—What would you wish to do if you were a college student again?
—That's very hard to say, but I wish I when I was a college student.
| A．has not studied biology | B．did study biology |
| C．had studied biology | D．studied biology |
His parents meant him_____________ scientific research, but he showed no interest and turned poet.
| A．going in for | B．to have gone in for |
| C．to go in for | D．having gone in for |