We made plans for a visit but _____ difficulties with the car prevented it.
| A．consequent | B．subordinate |
| C．substantial | D．subsequent |
.
– Jack, when shall we go to visit Mr. Smith?
– It’s up to him. We’ll go to see him whenever _______.
| A．he is convenient | B．he will be convenient |
| C．it will be convenient for him | D．it is convenient for him |
.
He spoke very slowly, but he still didn’t get his meaning _______.
| A．across | B．cross | C．through | D．though |
.
----I’m going downtown. ----Come on, _______.
| A．I’ll give you a lift | B．You are welcome |
| C．Don’t do that | D．Come with me |
.
This bag is twice ______ weight of that one. You’d better carry ______ lighter one of the two.
| A．/; / | B．a; the | C．the; the | D．the; a |
.
A clean environment can help the city bid for the Olympics, which ______ will promote its economic development.
| A．in time | B．in turn | C．in return | D．in fact |