Chris ______ his seat belt before his father asked him to do so.
A.fastened B.fastens C.had fastened D.will fasten
The 10th China flower expo ______ in Chongming Island from March to July in 2021.
A.was held B.will be held C.is held D.has been held
Students from other schools can’t borrow books in our library ______they fill in an application card.
A.if B.unless C.now that D.as soon as
The movie didn’t attract many people at first. ______ it turned out to be a great success at last.
A.so B.or C.but D.for
To keep safe, the doctors ______ take all the passengers’ temperature at the entrance.
A.must B.can C.may D.need
The robot can serve customers in restaurants. ______ quickly the technology develops!
A.How B.What a C.What an D.What
