从Ａ、Ｂ、Ｃ、Ｄ四个选项中，选出可以填入空白处的最佳选项，并在答题卡将该项涂黑。
6. To greatly raise people’s living conditions, _______.
A. all kinds of measures have taken
B. it is said that they have taken all kinds of measures
C. they have taken all kinds of measures
D. I think they have taken all kinds of measures
7. —What about going out this evening?
—Oh, I don't know. I've got a bit of a headache. And, John’s coming to see me, so I ought to stay in.
A. though B. therefore C. however D. anyway
