_________ time and labor, cartoonists generally draw the hands of their characters with only 3 fingers and a thumb.
A number of books in the library ____ been stolen so that the number of them ____ smaller than before.
Many of them ignored his advice, _______ they knew it to be very useful.
---Be quick! The mid-term exam _________. I must leave for school now.----No rush. The bus _______ at 7:20, so there is enough time left.
Liu Hulan was so brave that she showed no signs of _____ to the enemy even under torture(拷问) .
Believe it or not, there is no such thing __________ “standard English”.