The atomic weight of oxygen is_____than ______of the hydrogen.
A. 15 times heavier; that
B. 15 times heavier: those
C. 16 times as heavier; that
D. 16 times as heavy; those
In Singapore, people______eating or drinking on the subway can be fined up to 500 Singapore dollars.
A. having caught B. catching
C. caught D. to catch
The zookeeper was really annoyed with me.
— How could he have been if you______stones at the animals?
A. didn’t throw B. don’t throw
C. hadn’t thrown D. haven’t thrown
—What do you do as a volunteer in North Africa?
—__________! There are many poor people who need a lot of help.
A. None B. Something
C. Little D. Everything
They’ve moved to a different house_________their children can attend a better school.
A. in case B. so long as
C. so that D. even though
The Alibaba Group, _____was founded in 1999, has become China’s largest e-commerce company.
A. what B. which C. whose D. whether
