Which of the following words is pronounced /pri'vent/？（ ）
| A． |
present |
B． |
pretend |
C． |
prevent |
D． |
pleased |
I came to school ____ this morning because it was my turn to clean our classroom．（ ）
A．earlyB．slowlyC．quietlyD．suddenly
The villagers expect that the building of the bridge ____ before the rainy season comes．（ ）
A．is completedB．was completed
C．will be completedD．has been completed
﹣Shall we go to the airport to ___ your sister？
﹣I don't think it's necessary． She will come here by taxi．（ ）
A．see offB．pick up
C．look afterD．come across
﹣I wonder ____ the students have a physical examination．
﹣Once a year．（ ）
A．how farB．how soonC．how longD．how often
The designer has tried every possible way to make the robot light， so you _____ worry about its weight．（ ）
A．mustB．mayC．can'tD．needn't