You need to have______if you want to teach the group of naughty children well.

It takes me a lot of time _________ there by bike.

Miss Wang’s class is very interesting. — _ _ _ .We all like her class very much.

The US President Obama told the students that he ______ by a single mother who were strict with him and wished him great success in his studies

There was only one ____ oftransportation in this mountainous area five years ago