Ive known John well enough to say "Hello" , but not much more______than that.A．properlyB．p

Some well-known scientists believe that there is not enough oxygen on Mars to ______ human

The well－known formula: S→r...s→R was put forward byA．BloomfieldB．Firth.C．Hockett.D．Harris

Some well-known scientists believe that there is not enough oxygen on Mars to ______ human

It is well known that teaching is a job _____ enough patience.A. calling on

It is well known that teaching is a job enough patience. A. calling on B. callin

It is well known that teaching is a job ______ enough patience.A.calling onB.calling offC.