The number of pages in this dictionary ________ about two thousand.

ay’s college is appropriate as a setting for a society,________ itsmembers must acquire and manage knowledge from a wide variety of sources．

Only after they had discussed the matterfor several hours ______ a decision

It took _______ building supplies to construct these energy-saving houses. It took brains, too.

We were swimming in the lake _______ suddenly the storm started.