Choose the word or phrase that best completes each sentence below.
21. These two novels are both very interesting.______ one should I buy?
A. What B. Which C. Where D. Who
22. _________ it rains a lot in winter, I still love walking the dog in the park in this season.
A. Because B. As C. Although D. However
23. Excuse me, ______ is the staff room? I want to speak to Miss Lily.
A. When B. What C. Which D. Where
24. You'd better take an umbrella ________ it is going to rain.
A. so B. because. C. although D. and
25. ________ do you go to school? - Five days a week.
A. How often B. How much C. How many D. How long
26. George didn't want to get up late, ____ he set the alarm clock to go off at 6.30.
A. but B. and C. so D. for
27. __________ do you look like the most in your family?
A. Which B. Who C. What D. Where
28. I was crossing the road _________ the bus arrived at the station.
A. while B. because C. when D. as long as
29. ____ of your classmates are going camping with you?
A. How often B. How much C. How many D. How old
30. The car is very old, __________ it is reliable
A. but B. and C. so D. because