—How’s your tour around the North Lake? Is it beautiful?—It __________ be, but it is now heavily polluted.
______worried the child most was _____ to visit his mother in the hospital.
We shouldn’t complain about________, because many families are much _____ in the mountainous area.
All the machines stopped _____ with the electricity _____ throughout the factory.
You should try to get a good night’s sleep ________ much work you have to do.
Neither Tom nor Jack and I ________ his students, but each of us ______ him very much.