—How’s your tour around the North Lake? Is it beautiful?—It          be, but it is now heavily polluted.

To qualify yourself for this kind of new job, I recommend that you ________ some online courses.

(2013·河北衡水一中六模)Some young people these days just ________ go out of their homes to contact the real world.

Had it been possible I would have gone to the movies but I _____ busy.

(2009福建泉州毕业模拟) --Where have you been? --I        in the heavy traffic. Otherwise I        here earlier.