In order not to be disturbed ,I spent three days ________ in my study.
| A．locking | B．locked | C．to lock | D．lock |
．Have youconsideredthestudents’ request _________ the school library _______ more books on popular science?
| A．that; provide | B．when ; provided |
| C．which; should provide | D．where; would provide |
．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 |