Jack ________in the lab when the power cut occurred.
| A． |
works |
B． |
has worked |
C． |
was working |
D． |
would work |
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 |
Technological innovations， ______ good marketing， will promote the sales of these products．（ ）
| A． |
combined with |
B． |
combining with |
| C． |
having combined with |
D． |
to be combined with |
Taking on this challenge will bring you ______ someone who shares your interests．（ ）
| A． |
in exchange for |
B． |
in answer to |
| C． |
in contact with |
D． |
in memory of |