I’d rather ride a bike as bike riding has _____ of the trouble of taking buses.
| A．much | B．all | C．neither | D．none |
I'm calling about the apartment you ________ the other day. Could you tell me more about it?
| A．advertised | B．had advertised |
| C．are advertising | D．will advertise |
(2013·四川，3)Hurry up, kids! The school bus ______ for us!
| A．waits | B．was waiting |
| C．waited | D．is waiting |
We are confident that the environment ________ by our further efforts to reduce pollution.
| A．had been improved | B．will be improved |
| C．is improved | D．was improved |
Generally, students' inner motivation with high expectations from others ________ essential to their development.
| A．is | B．are |
| C．was | D．were |
If we ________ now to protect the environment, we’ll live to regret it.
| A．hadn’t acted | B．haven’t acted |
| C．don’t act | D．won’t act |