I just wonder ____ that makes him so excited.

These books are ____ intended for those who learn how to use computers It’s an ABC of computer learning[ ]

Many young people in the West are expected to leave ______________ could be life’s most important decision — marriage — almost entirely up to luck.

I want to eat one of the _______.

The government must be very _____ about settingpolicies and make no decision until they are quite sure it is the right one.