Kathy ______ a lot of Spanish by playing with the native boys and girls.
A．picked up B．look up C．made up D．turned up
Everything was placed exactly ______ he wanted it for the graduation ceremony.
A．while B．when C．where D．though
The three of us ______ around Europe for about a month last summer.
A．traveled B．have traveled C．had traveled D．travel
Experiments of this kind _______in both the U.S. and Europe well before the Second World War started.
A．have conducted B．have been conducted
C．had conducted D．had been conducted
Robert is said________ abroad, but I don’t know what country he studied in.
A．to have studied B．to study
C．to be studying D．to be studied
We live in an age ________ more information is available with greater ease than ever before.
A．why B．when C．to whom D．on which
