A Wechat(微信)is an invention ________can help people talk to friends,share photos,ideas and feelings freely . A. which B. who C. /
.----Look! Our Chinese teacher, Mr Zhang, is playing badminton there. ----No, it ________ be Mr Zhang,. He has gone to Guangzhou for a meeting.
____Tom ______ his friend know about types of personality.
----Have you ever __________ Peter Tchaikovsky before? ----Oh,. A Russian composer of classical music.
---How much difficulty did you have________________ this physics problem? ---_____________. It's quite easy.
----______number of cars on the roads is growing too fast. ----I agree with you. ______ number of problems have appeared already.