--_____ did you ________the summer vacation? -- It was terrible . I have too much homework to do .
Mr. White spent about one hour and a half _________ the accident report yesterday evening.
To live a green life, we try_________ more energy and produce less pollution.
In recent years the environmental pollution has been _________ than before.
.It is said that a wooden bridge_________ over the river in the mountain village soon.
I’d like to travel by air _________ it usually costs a lot of money.