—Must I turn off the gas after cooking? —Of course, you can never be ____careful with that.
#93013
A
enough
B
very
C
so
D
Too
推荐题目
 You can’t _____ until tomorrow morning after the blood examination.
#94706
A
not only eat but also drink
B
either eat or drink
C
neither eat nor drink  
D
both eat and drink
________, the boy couldn’t enter his house. 
#94032
A
Since the key has lost
B
The key been lost
C
Lost the key
D
Having lost the key
Leonardo da Vinci (1452-1519) ____ birds kept in cages in order to have the pleasure of setting them free.
#92910
A
is said to be buying
B
is said to have bought
C
had said to buy
D
has sad to have bought