We understand _______small changes to our land can have a big impact upon our environment __________ as we know is vulnerable enough.
| A．what; which | B．what; where | C．how; where | D．how; which |
—I am wondering if we could go boating on the weekend.
—It a good idea.
| A．sound | B．sounded | C．sounding | D．sounds |
The building around the corner caught fire last night. The police are now____ the matter.
| A．looking up | B．looking out | C．looking into | D．looking for |
The building around the corner caught fire last night. The police are now____ the matter.
| A．looking up | B．looking out | C．looking into | D．looking for |
The man who was being followed stopped from time to time ____ he wanted to tie his shoelaces.
| A．as if | B．like | C．what | D．as |
He was found to be a thief, ____ disappointed his wife.
| A．who | B．that | C．which | D．whom |