We can't ______ buying a new printer for our company．The one we have doesn't work．（ ）
| A． |
take up |
B． |
carry out |
C． |
keep on |
D． |
put off |
Jim says we ______ stay in his house as long as we leave it clean and tidy．（ ）
| A． |
must |
B． |
can |
C． |
need |
D． |
should |
﹣Do you know anything about Zhang Zhongjing？
﹣______ He has been honored as a master doctor since the Eastern Han Dynasty．（ ）
| A． |
How come？ |
B． |
So what？ |
| C． |
By all means． |
D． |
With pleasure． |
The speed of 6G will exceed 125 GB/s，______ a new generation of virtual reality．（ ）
| A． |
allowing for |
B． |
accounting for |
| C． |
calling for |
D． |
compensating for |
The health security systems of many countries are undergoing considerable ______．（ ）
| A． |
reservation |
B． |
transformation |
| C． |
distinction |
D． |
submission |
This actor often has the first two tricks planned before performing，and then goes for ______．（ ）
| A． |
whichever |
B． |
whenever |
C． |
wherever |
D． |
whatever |