Our food and water _____, we’d better control our amounts, if not, we all can’t survive before the rescue comes.
John agreed to the suggestion that his students _____ two weeks to prepare for the exam.
Great changes have taken place in that school. It’s no longer ___ it was 20 years ago, ____ it was so poor.
Dark clouds _______ the sunlight. It seemed as if it was going to rain.
The little child didn’t understand the ____ question so there was a ____ expression on his face.
Robert is interested in ________ astronomy and he wishes he could make a trip into ________ space one day.