16、The balls are solid, makes them very heavy.* T" `0 Y9 |. [( c1 e
A.it B.what C.which D.that7 O! ]% {/ Y3 W
17、Is this calculator you borrowed from Jane? , B$ q0 k; U7 y! u A.which B.one C.the one D.what ! C9 G x# t* ^2 o: M2 c
18、The scientist and his achievements you told me about are admired by us. " o5 t N) }: C- u) U7 H+ x; u5 j A.who B.that C.which D. /: y% b: q* s2 z0 R4 S$ e4 i. c
19、I suppose the theory he stuck correct.# [2 U' Y# y4 x- A' O% w
A.to prove B.to proving C.to proved D.prove & H. O. o M; x; T+ ^4 K5 C 20、He is working hard, will make him pass the final exam. : _: _# s" z" d# x3 I' x A.who B.that C.which D.it " a# Q8 c% y3 w) k6 M% n+ e16、C 17、C 18、B 5 ?8 o" y" m" |" L% ?4 I 19、C 20、C