My little sister_________ in the hall at that time yesterday.
Artemisinin _______ by Tu Youyou,a great Chinese scientist.( )
A.was inventedB.invented
C.has invented
As our children get bigger,our house seems to get ________.( )
A.the smallerB.smaller
C.smallest
The watch _______ you gave me keeps perfect time.( )
A.whoB.whatC.that
She went to a European university to study art._______ university is really amazing.( )
A.AnB.TheC.A
He ________ in Zhuzhou since seven years ago.( )
A.worksB.workedC.has worked