During the opening ceremony, “Miss Smile” has won the hearts of Chinese Internet users after being caught _____ the same smile for nearly 20 minutes．
| A．fixed | B．fixing |
| C．to be fixed | D．to fix |
________ the programme, they have to stay there for another two weeks.
A Not completing B Not completed
C Not having completed D Having not completed
When the boss came in, these workers pretended to________ carefully.
| A．working | B．be working |
| C．work | D．have been working |
People often have this belief ___development is bad for the environment, but this does not have to be true.
A which B whose C that D when
The children were ______ for the accident. After all they were so young.
| A．not to blame | B．to not blame |
| C．not blamed | D．to not be blamed |
—Mary, let’s go to the bookshop this weekend. Will you be ______?
—Sorry, but I’m going to visit my uncle in the countryside.
| A．vacant | B．suitable | C．convenient | D．available |