After a series of researches, they finally ___ that the pollution was the leading factor contributing to the death of the creatures in the river.
| A．drew a conclusion |
| B．came a conclusion |
| C．arrived a conclusion |
| D．made the decision |
--- Don’t do that again. Don’t you think it _______?
--- It maybe _______ to be successful.
| A．a waste of time; turns | B．wastes of time; turns in |
| C．waste of time; turns up | D．a waste of time; turns out |
Titanic is the most exciting film _______ I have ever seen.
| A．which | B．what | C．that | D．of |
______ has helped to save the drowning girl is worth praising.
| A．Who | B．The one | C．Anyone | D．whoever |
Although the working mother is very busy, she still ______ a lot of time to her children.
| A．devotes | B．spends | C．offers | D．provides |
When you are learning a foreign language, _______, you must forget your own language.
| A．at the first | B．first of all | C．in first | D．first at all |