【单选题】
Not until the early years of the 19th century ____ what heat is.
①
man knew
②
did man know
③
man did know
④
didn’t man know
【单选题】
That day he ___________ his clothes before he came to see me.
①
has washed
②
washed
③
had been washing
④
was washed
【单选题】
That day he ___ his clothes before he came to see me.
①
has washed
②
washed
③
had been washing
④
was washed
【单选题】
A: Excuse me, [填空]？ B: Certainly, Walk three blocks along this street, and then turn left. Walk another block, and youll find the cinema across the street. You cant miss it.
①
but will you please tell me where you live
②
but can you help me with the bag
③
but would you tell me how to find the cinema
④
but can you tell me the way to the cinema
【单选题】
Every morning Mr. Smith takes a ____walk to his office.
①
20 minute
②
20 minutes
③
20-minutes
④
20-minute