Put the_______of your tongueagainst your upper teeth when you produce the sound。
Mandela met a lot of difficulties, he still fought for the equal rights of his people.
iPhone 6s have been on sale for over a month, but they are still hardfor Chinese.
Sometimes we need true friends’ shoulders ____we can cry to free ourselves from pain.
If we don’t often use the newly learned words, we’ll _____ forget them.
It is widely____ that hard work can help students make progress.