Without trees our world ______ a much drier place.
A: is
B: will be
C: would be
D: must be
A: is
B: will be
C: would be
D: must be
举一反三
- If tedious tasks could be _____ , the world would be a much better place.
- Without my watchfulness our boat（）away to the open se A: could have drifted B: must drift C: would be drifting D: would have drifted
- Without electricity, what ______ A: will the world be like B: would the world be like C: the world will be like D: the world be like
- In order ________ the world a friendly place. One must show a friendly face.
- In the past 30 years, great changes ___(take place) in our country. A: took place B: take place C: have taken place D: were taking place.