Scientists ______ thousands of chemicals before they decided on the right one in the end.
A.tried out | B.found out |
C.worked out | D.turned out |
Little Tom was so enthusiastic about learning Chinese and after six months, he could speak it ______ fluently.
A.professionally | B.correctly | C.pretty | D.locally |
This is a complex operation. A team of nurses _____ the doctor in performing the operation.
A.trained | B.assisted | C.interviewed | D.added |
The conflict between economic development and environmental protection, if not appropriately _________, can cause disastrous consequences in daily life settings.
A.being managed | B.to manage |
C.managed | D.managing |
People are always coming in here borrowing my hammer, you know, to fix a cart wheel or ______.
A.anything | B.something |
C.everything | D.nothing |
The WHO ________ eat less bacon and other preserved meat because they can cause cancer.
A.appeals people to | B.appeals to people to |
C.calls in people to | D.calls on people |