________ he discovered in his experiment is very important to us.A、ThatB、WhenC、WhatD、Whe

His eyes shone brightly when he finally received the magazine he ______.A．had long been ex

He looked quite healthy though he was ______.A．in seventyB．in his seventyC．at seventiesD．a

He is over fifty, but he looks as if he ____________ only in his thirties. A. were

He planned to steal the money, but his ______ were discovered.A．arrangementsB．blueprintsC．

He gave up his study in college in _______.A bund

He looked quite healthy though he was ______.A.in seventyB.in his seventyC.at seventiesD.a