—How many times Carl to the Great Wall?
—Only once.
A. does ;go B. did; go
C. has; gone D. has; been
Sherlock Holmes asked the suspect what he ___ when the murder took place.
A. was doing B. has done
C. is doing D. would do
In the UK, a lady usually doesn't like to be asked ___.
A. whether has she got married B. how old is she
C. where she comes from D. how much she weighs
---I'm going to give a talk on the Dragon Boat Festival to the exchange students.
---Great! But don't forget to tell them______.
A. what should they eat at the festival
B. why people enjoy the full moon
C. what kind of race is often held
D. How do people celebrate it
___ great fun we had in Yandu Park last Sunday!
A. How B. What
C. What a D. How a
— Must I turn off the gas after cooking?
— Of course. You can never be________ careful with that.
A. enough B. too
C. so D. very
