By using ears one can tell the direction _____ a sound comes.
A. in which B. from which
C. with which D. through which
Don’t forget to take your cellphone with you _____ you can call for help if necessary.
A. now that B. even if C. so as D. in case
What especially impressed us was the way _____ our teacher studied foreign language.
A. / B. which C. by which D. what
As you know, this is the day_____ the quake happened thirty years ago.
A. that B. for which C. where D. when
---Hi , Bruce. Here is a letter for you.
--- Thanks. I wonder _____.
A. who the letter was from B. who was from the letter
C. who was the letter from D. who from the letter was
---Would you like _____ camping with me?
---- I ’d like to. But I’m busy _____ my homework.
A. to go; to do B. to go; doing
C. going; to do D. going; doing
