49. I don’t know whether small oranges are sweeter than big ______.
| A．those | B．ones | C．one | D．that |
He sat at the desk, __________ a novel.
| A．read | B．to read | C．reading | D．reads |
______ tourism developing, more and more people prefer to go travelling for a holiday.
| A．As. | B．With | C．Upon | D．For |
.--- I was lucky the win a gold medal in the800-metre race.
--- You ____ through hard training.
| A．must go | B．should go | C．must have gone | D．should have gone. |
—Excuse me, Dad, but I’m going to the club to meet my friends in the football team.
—OK. ______
| A．Have fun | B．Congratulations | C．With pleasure | D．Gook luck |
You can’t complain of being lonelyyou don’t make any effort to meet people．
| A．until | B．when | C．once | D．though |