—Have you finished your work yet?—No, I’ll finish it in ________ fifteen minutes.
It was a matter of________ would take the position.
it rain tomorrow, we would have to call off the hike.
The government has decided to give preference to those environmently-friendly business and companies in all aspects in _______ of sustainable development.
The Voice of China is such a popular program with viewers has produced many a music-lover.
The split between humans and apes is believed by scientists______15 to 20 million years ago.