单选题 I used to smoke ___ but I gave it up three years ago.

单选题 They discussed ___ they could settle the problem without others’ help.

单选题 New technologies have made ___ possible to turn out new products faster and at a low cost.

单选题 I think Tom, as the head of a big department, should either study regularly or ___ his job.

单选题 If only I ___ hard in the past few months! But I didn’t work hard enough and failed the maths examination.

单选题 After Yang Liwei succeeded in circling the earth, ___ our astronauts desire to do is walk in space.

单选题 We will put off the picnic until next week ___ the weather may be better.

单选题 The moon shines brightly, as if it ___ light by itself.

单选题 The nurses are trying their best to reduce the patient’s fear ___ he would die of the disease.