________ pieces of bread do you want—Two, please. And ________ are they

The library needs __________, but it’ll have to waituntil Sunday.

Before a problem can be solved, it must be obvious _____ the problem itself is. [ ]

–Do you think that we should make preparations forthe competition in advance -–Exactly. ______.

It was unwise of him to _________ the unreliable data in his speech.