1 . ______ hasn’t been decided ______ we’ll go camping at the weekend.

A．That; whether

B．It; whether

C．What; if

D．This; if

2 . My father, ______ was often the case, came with me to grocery shops and taught me how to pick out produce by smell and touch.

A．as

B．that

C．what

D．who

3 . As it is possible now to import from distant countries, people today have a more ___ diet than their ancestors.

A．various

B．variety

C．varies

D．various of

4 . As is known to us all, children in our country have the right of receiving ________ education by law.

A．traditional

B．commercial

C．cultural

D．compulsory