Great efforts___________grain production must be made if food shortages are to be avoided.
Many of the onefamily children are so accustomed to ________ that they react violently when they hear something different.
If you think that treating a woman well means always ________ her permission for things, think again.
The monument was built in honor of the explorer who was believed ________ the big river.
After chatting on QQ a long time, Mary looked up, ________ that it was 11:00 pm, long past her usual bedtime.
—What do you think of the two students ________ to take part in the competition? —They are hardworking as well as intelligent.