【单选题】
The trees must ________ three times a week.
【判断题】
The work?was?finished?by mine last week.
【单选题】
5. There are seven days in _______ week.
【单选题】
If it ___ next week, the crops would be saved.
【单选题】
17. A survey was carried out on the death rate of new-born babies in that region, ____were surprising.
【单选题】
This is the military ____, and nobody is allowed to get in without permission. ?
【单选题】
Dave ____ into the house without ____ out by his parents.
【单选题】
It was strange _______ she left without saying a word.
【单选题】
One of my ____ sentences is: there is no smoke without fire.
【单选题】
Man________die without air or water.