You don’t know what great difficulty I had ____ to get the two tickets. Is the film
really worth ____ twice?
A managing; seeing B. managed; seeing C managing; being seen D managed;being seen
The old man would appreciate _____ if you could do him that favour.
| A．one | B．it | C．that | D．this |
It is reported that this kind of vegetables _ a lot of vitamins C.
A. contains B. includes C. holds D. keeps
______ time went by , Herbert could finish all the maths exercises in class.
| A．With | B．As | C．while | D．Since |
Lots of the scientists in our country are working hard to ____the planet Mars .
| A．cover | B．search | C．discover | D． explore |
Look at the notice . You are not allowed ____ the gymnasium without permission.
| A．to enter | B．enter | C．entering | D．for entering |