According the experts, when headset sound reaches 110 decibcls, it can be used at most for ______.
A: one hour
B: two hours
C: half an hour
D: three hours
A: one hour
B: two hours
C: half an hour
D: three hours
举一反三
- It took me ________ to find out the key to the drawer. A: one and half hours B: one and a half hours C: one and a half hour D: one and half hour
- How long will the volunteer spend on math each week if teaching both math and English A: One hour a week. B: Two hours a week. C: One hour a day. D: Two hours a day.
- The airport is _______ from my hometown. A: two hour’s ride B: two hours’ ride C: two hour ride D: two hours ride
- When will the movie begin? A: in ten minutes. B: in an hour C: in two hours
- It is about ______ walk from here to the office. A: half an hour's B: half a hour's C: half an hours'