At times, worrying is a normal, ________ response to a difficult event or situation – a loved one being injured in an accident, for example.
| A．effective | B．individual |
| C．inevitable | D．unfavorable |
．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 |
．It is obvious to the students ______ they should get well prepared for their future.
| A．as | B．which | C．whether | D．that |
．I’m sorry you’ve been waiting so long， but it’ll still be some time ____ Brian gets back.
| A．before | B．since | C．till | D．after |
The house I grew up ________ has been taken down and replaced by an office building.
| A．in it | B．in | C．in that | D．in which |
I invited Mary and Jane to dinner, but of them came.
| A．none | B．either | C．both | D．neither |