Mary’s score on the test is the highest in her class.— Really? She ______ have studied very hard. [ ]

Don’t tell a lie, little boy! You should be ________ honest child.

Excuse me, sir. When can we have a swim in the pool—Not until it ________ next month.

Watch out! Do not get too close to the building. The walls .

You mustn’t put__________ into the rubbish bin.