Jane studies chemistry ________ asking the teacher ________ help.
| A．for; by | B．for; to | C．by; by | D．by; for |
I think _________ history about China is very important.
| A．study | B．studying | C．studied | D．studies |
Teenagers should be allowed______ their own clothes.
| A．to choose | B．choose | C．chose | D．choosing |
Mary used to _____short hair.
| A．be | B．have | C．had | D．has |
Most Chinese children like to sleep with their parents.
They are ____ the dark.
| A．afraid | B．afraid of | C．afraid to | D．afraid in |
--- _____do you study for a test?
---By reading the textbook.
| A．What | B．When | C．How | D．Where |