Interest is as ________ to learning as the ability to understand, even more so.

—How’s your new babysitter? —We ______ ask for a better one. All of our kids love her so much.

   As we know, the coming of radio in this century made ocean sailing much ______.

The authorities declared that because of the war petrol was _____ and had to be rationed (定量供应).

They spoke ___ of the young man because he jumped very ___ in the high jump.