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【題目】_______ great efforts we had made, we failed to carry our plans through.

【題目】What is the man doing?

【題目】_______ less energy, the new kind of machine is appreciated by most of the users.

【題目】What does the man wish the robot could do?

【題目】Did I really hear someone come in or was it only a(an) ?

【題目】—What do you think of your boss?

【題目】—Why didn’t Tom ask for help then?

【題目】________ being fun, watching English videos is a good form of listening exercise.

【題目】As was expected, the peace talk between the two countries has________ at last and a war can’t be avoided.

【題目】The pilot, as well as all the passengers, ________ lucky to survive the air crash due to his extraordinary skills.