The place ________the bridge is supposed to be built should be_________ the cross-river traffic is the heaviest.[ ]

I don’t know _______he will come tomorrow. _______he comes, I’ll tell you.—That’s a deal!

127. The South African student always keepsin touch with his family by e-mail and never _____ to write to his mother.

Did you manage to contact professor Li?–Well, yes, _________

With the price of oil _____, the economy of that country is slowing down.