One of the best ways for people to keep fit is to ________healthy eating habits.
| A．grow |
| B．develop |
| C．increase |
| D．raise |
Some people find the film Avatar difficult______.
| A．to understand | B．to be understood |
| C．understood | D．being understood |
This maths problem isthat one．
| A．not so easy as | B．more easy than | C．as easier as | D．easy than |
. Who could have ____ that within 10 years he’d be in charge of the whole company?
| A．indicated | B．promised | C．supported | D．predicted |
This young tree could not have been damaged ______accident; I believe it was done _____ purpose.
| A．by; on | B．for; with | C．by; with | D．for; on |
All the students ______come from America are here.
| A．who | B．which | C．/ | D．that |