Choose the answer among A, B, C, D to complete each of the sentences below:
We have bought extra food ______ our friends stay to dinner.
A.as long as
B.provided
C.if
D.in case

Choose the answer among A, B, C, D to complete each of the sentences below:
The _______ of these toxic substances into the environment is potentially devastating.
A.delivery
B.research
C.distribution
D.release

Choose the answer among A, B, C, D to complete each of the sentences below:
_____ test was given, our class leader managed to get good marks.
A.However
B.Wherever
C.Whatever
D.Whenever

Choose the answer among A, B, C, D to complete each of the sentences below:
Their efforts were much ______ when they won 2 gold, medals in bodybuilding and billiards.
A.expended
B.required
C.considered
D.appreciated

Choose the answer among A, B, C, D to complete each of the sentences below:
I am pleased to _______ the winner of the final competition. It's Group B
A.recite
B.appoint
C.announce
D.explain

Choose the answer among A, B, C, D to complete each of the sentences below:
Our field _____ have performed very well.
A.artists
B.sportmen
C.athletes
D.specialists

Choose the answer among A, B, C, D to complete each of the sentences below:
They volunteer to take care of children who have been ______ by the AIDS epidemic.
A.supported
B.left
C.suffered
D.orphaned

Choose the answer among A, B, C, D to complete each of the sentences below:
The singer was _____ on the piano by her sister.
A.played
B.helped
C.performed
D.accompanied

Choose the answer among A, B, C, D to complete each of the sentences below:
The 27-year-old Soviet cosmonaut became the first person to eat and drink in ______.
A.weightless
B.weighting
C.weightlessness
D.weight

Choose the answer among A, B, C, D to complete each of the sentences below:
My friend Dave was really interested in my best stamp, so I _____ it away to him.
A.brought
B.gave
C.threw
D.put