Why not try another way _______ you may do your experiment better and more quickly?
| A．/ | B．which | C．of which | D．by which |
There was _____to prevent the accident .
A something could doB anything we could do
C nothing we couldn’t doD nothing we could do
---- Is Mary coming to the concert?
---- I think ________.
| A．yes | B．it | C．that | D．so |
---- Have you been here long?
---- _______.
| A．No, not very long | B．Not much long |
| C．Yes, only little long | D．No, only yesterday |
________ mud on his trousers brushes off easily.
| A．Drying | B．Having dried | C．Being dry | D．Dried |
The young lady was careful _________.
| A．not repeating her mistake | B．not repeated her mistake |
| C．to not repeat her mistake | D．never to repeat her mistake |