Caroline doesn’t have a gift for music，but she ______ it with hard work.

Is Jack on duty today?—It________ be him. It’s his turn tomorrow.

The government must be very ________ about setting policies and make no decision until theyare quite sure it is the right one.[ ]

They enjoyed in the park．

What a pity! The tickets for the football match have been sold out.——Don’t worry. You can watch__________on TV.