This problem is _ for us; therefore, we must take it into serious consideration．
| A．ready | B．familiar |
| C．suitable | D．vital |
Please __________ that you must review your lesson after class.
| A．keep you in mind | B．keep that in mind | C．keep it in mind | D．keep in mind |
If I am not __________ when you phone, ask for someone else’s help.
| A．accessible | B．available | C．stable | D．suitable |
What I’m interested in is radios and telephones, so I’d like to study __________ Engineering during my four years in university.
| A．Electric | B．Electrical | C．Electronic | D．Electricity |
He has enormous funds __________ his command.
| A．at | B．on | C．over | D．in |
Life is like an onion，sometimes makes you weep when you try to open it．
| A．that | B．as | C．which | D．what |