In order not to be disturbed, I spent three days ___ up in my study.
| A．locking | B．being locked | C．to look | D．locked |
There’s no doubt ________ international cooperation is the key to ______ with cybercrime.(网络犯罪)
| A．whether; doing | B．that; dealing |
| C．whether; do | D．that; do |
As is known to all, the financial crisis firstly broke out in the United States _______ the group of developed countries.
| A．belonging to | B．was belonging to |
| C．belonged to | D．is belonged to |
-------Let’s go to the concert this weekend.
--------________.I’ve heard my favourite pianist Lang Lang is coming.
| A．Go ahead | B．That’ s all right |
| C．Good idea | D．I don’t agree |
Online shopping, when properly, can save a lot of time ,money and energy..
| A．done | B．is done |
| C．having done | D．to do |
computers play an important part in people’s daily life , they still have some disadvantages.
| A．Since | B．As | C．If | D．While |