Experiments of this kind ___in both the U．S and Europe well before the Second World War．
| A．had conducted | B．have conducted |
| C．have been conducted | D． had been conducted |
—Excuse me, can you show me the way to Baiyun Middle School?
—Sorry, I don’t know. I’m a stranger here.
—___.
| A．Thank you all the same | B．It doesn’t matter |
| C．Never mind | D．No problem |
I came back again,___ sure I had locked my door.
| A．making | B．to make | C．made | D．makes |
It is highly _ __ that, in many schools, they are going to spend less time in the classroom than they used to.
| A．possibly | B．probably | C．likely | D．lovely |
He is pleased with the way ___ you organized the party.
| A．in that | B．which | C．why | D．in which |
I knew __ a _ certain John Brown, but not ___ famous one.
| A．不填；a | B．a；the | C．不填；the | D．the；a |