The old man has two sons, ____________ are working in the supermarket.
It was not until he saw his mom _________.
John is very lazy. He falls ______ behind among the students.
The government must be very _____ about setting policies and make no decision until they are quite sure it is the right one.
I don’t understand how he can say that everything is fine _____ it’s so obvious that it’s not.
Please remember to _____ a stamp _____ your envelope before you post it to your friend.