Did they have a good time at the party?—Judging by their smiles, they _________ have enjoyed themselves.

It seems that living green is____ easy and affordable A small step makes a big difference[ ]

ty, Maugham decided to withdraw from the theaterand wrote The Summer Up, in which he tried to review what he _______ from hislife and literature.

Susan isn’t sure ________her parents will allow her to get a part－time job.

________ you are interested in astronomy, you can read the book