New iPhone goes on sale on Friday with ________ bigger screen and 4G wireless technology, as ________ company seeks to keep its competitiveness.
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.
--- Have you heard that Mo Yan was awarded the Nobel Prize in Literature last year?--- _____. He has made a positive contribution to that field.