________ he made up his mind to take a trip to Europe?
A．When was it that B．to That was it when C．That it was when D．When it was that
The number of the students in our school ________ about 3000 and ______ them study hard.
A．is, a large amount of B．are, a number of
C．are, large amount of D．is, a large number of
Rather than ______ on a crowded bus, he always prefers _____ a bicycle.
A．ride, ride B．riding, ride C．ride, to ride D．to ride, riding
He has devoted most of his time and energy _______ a cure for the disease.
A．find B．finding C．to find D．to finding
The child asked his mother _______ go out to play tennis.
A．that he could B．if he could C．if could he D．that could he
– Do you know the West Lake in Hangzhou?
– Yes, this is the third time that I ____ this beautiful city.
A．visit B．visited C．have visited D．had visited
