Tostudyaforeignlanguage,__________.
A、agooddictionaryshouldbebought
B、buyingagooddictionaryisnecessary
C、youshouldbuyagooddictionary
D、itisnecessarythatyouwillbuyagooddictionary
Becareful,_______you'llfalldown.
A、onthecontrary
B、orrather
C、orelse
D、asfor
It________asashocktorealizethatIwasnotaloneintheroom.
A、came
B、appeared
C、arrived
D、reached
Theassociationis________toraisingfundstohelptheblind.
A、conducted
B、committed
C、concentrated
D、concerned
Constructionoftherailwayshelpedtodevelopthenational_______ofTanzaniaandZambia.
A、economic
B、economies
C、economics
D、economical