There are so many kinds of computers in the shop. I really don't know ______ to choose.
A. what B. which C. how D. where
-- How can I ______ well with my lessons, Dad?
-- Practice makes perfect.
A. work on B. hold on C. get on D. keep on
-- I hope you don't mind my opening the window.
-- ______ It's much too hot in here.
A. Certainly B. Of course not
C. All right D. Never mind
Bob promises to join in the football match ______ he has to help his parents on the farm.
A. if B. as C. unless D. when
-- Did you find the small village yesterday?
-- Yes, without any difficulty, for it has ______ changed over years.
A. hardly B. greatly C. clearly D. nearly
-- What time do you expect me back, Mum?
-- Say, ______half an hour.
A. at B. before C. in D. for
