A、对
B、错
A、对
B、错
A、Having a limited vocabulary.
B、Expressing his ideas in English.
C、Understanding authentic listening materials.
D、English grammar.
A、I hadn’t thought of that before. Thanks for the advice.
B、Find a cheap hotel on the Internet.
C、I think it helps when you study with friends.
D、Have you thought about seeing a movie instead?