Building such a bridge over the bay was ______,but the local government made it within two years.( )
a wet blanket
a piece of cake
a dark horse
a hard nut to crack
April 23 is stated as World Book Day, an important date for literature around the world, _______ Shakespeare was born and died.
We human beings should be very careful with what we do with nature, _____power is beyond our understanding.
()I found the lecture hard to follow because it ____ when I arrived.
I haven’t finished my report, but I promise I ______ it by the end of the week.
It's a custom in China to have some tea or other drinks before the meal ________.