Jim says we ______ stay in his house as long as we leave it clean and tidy.( )
must
can
need
should
________ it rain tomorrow, we should have to put off the visit to the Yangpu Bridge.
________ anyone come to my office, please tell them I'm not available before four o’clock.
Had he not come an hour earlier, he___the secret that his mother was always there.
---- What do you think of a house supplied by Lovell ? ---- _______ you buy a home from Lovell, the company promises to buy it back at the same price after three years.
Had the government limited the sales of cars much earlier, traffic jam and pollution _______so serious now.