Don’t ______ to spring-clean the whole house just because my mother is coming---there's no need to do that.
A.undertake | B.attempt | C.bother | D.hesitate |
The ________ for tonight’s talk is protecting the environmet.
A.title | B.subject | C.news | D.theme |
You can't camp________you like these days. Many natural areas are now under protection.
A.whichever | B.wherever | C.what | D.when |
The samples__________in quality but were general acceptable.
A.varied | B.changed | C.disagreed | D.Exchanged |
Cleaning women in big cities get _____ by the hour.
A.pay | B.paying | C.paid | D.to pay |
What makes the space shuttleis that it takes off like a rocket but lands like an airplane.
A.exceptional | B.strange | C.unique | D.rare |