---Do you know ________?

---Let me see. I remember it was on March 18th.

A. why did they move here    B. why they moved here

C. when did they move here     D. when they moved here

Don’t worry. Bill will help you look after your dog when you ________ away on business.

A. are    B. were    C. will be   D. have been

---You play the piano so well. ________ do you take piano lessons?

---I go to piano lessons twice a week.

A. How long   B. How many   C. How often   D. How much

---I think it’s necessary to learn how to work in groups.

---I quite agree. Sometimes it’s even ________ than grades.

A. less important

B. more important 

C. the least important 

D. the most important

A true friend will never ________ from you when you’re in trouble.

A. take away   B. run away   C. put off   D. get off

When spring comes, trees begin to ________ green.

A. sound    B. taste    C. keep    D. turn

---I’m sorry. I broke your tea cup.

---________. I have another one at home.

A. It doesn’t matter         B. You’d better not

C. My pleasure               D. It’s too bad

Chen Wei isn’t at school today ________ he is taking a robot competition in Shanghai.

A. so     B. because   C. before    D. if

It was late. She opened the door ________ because she didn’t want to wake up her grandma.

A. angrily    B. quietly   C. loudly    D. heavily

Meimei is going to be an older sister. Her parents are planning to have their ________ child.

A. one    B. two    C. first    D. second