These diagrams are especially helpful when we have a concrete problem ________ at hand.
#88821
A
be solved
B
to solve
C
solved
D
being solved
推荐题目
- Doing it like this means _______ time. -I didn’t mean ______ it.
#95810
A
wasting…to do
B
to waste…doing
C
waste…do
D
wasting…doing
 ______ into many languages, the book is popular in many countries.  
#88663
A
Being translated
B
Having translated
C
To be translated
D
Having been translated
--- Why do you look sad?---There are so many problems ______.
#94408
A
remaining to settle
B
remained settling
C
remaining to be settled
D
remained to be settled