________ the problem of land erosion(侵蚀) getting more serious, the government is searching for a way to deal with it.
| A．As | B．When | C．With | D．If |
My iPhone isn’t in my bag．Where ____ I have put it?
| A．can | B．must | C．should | D．would |
____ you start eating in a healthier way, weight control will become much easier．
| A．Unless | B．Although |
| C．Before | D．Once |
She wishes she ___to the cinema last night．
| A．went | B．would go |
| C．had gone | D．were going |
The old scientist used to say that knowledge ______ from practice．
| A．was coming | B．comes |
| C．had come | D．would come |
A person _____e-mail account is full won’t be able to send or receive any e-mails．
| A．who | B．whom |
| C．whose | D．whoever |