【推荐1】They pretended ________(work) hard when the teacher came in. (所给词的适当形式填空)

【推荐2】Lucy’s new job paid twice as much as she had made _________ (work) in the restaurant. （所给词的适当形式填空）

【推荐3】I was considering this while________(work) as a nurse just a few weeks ago. （所给词的适当形式填空）

【推荐1】Modern methods of tracking polar bear populations______(employ) only since the mid-1980s, and are expensive______(perform) consistently over a large area. (所给词的适当形式填空)

【推荐2】I like getting up very early in summer. The morning air is so good ________(breathe).

【推荐3】Alice, the sales manager of the company, is doing a course to ________ (sharp) her business skills. (所给词的适当形式填空)