My sister met him in the hospital yesterday afternoon, so he _________ your lecture.

--It is really fun to hike and I often go hiking in the forest.--But hiking alone in the forest ______ be very dangerous.

Often he______ sit for hours doing nothing at all when he was in low spirits.

– Could I use your mobile phone? I have to call my mom for the coming class meeting. --Yes, of course you _____________.

He bought some books in the bookstore and his father________ him a lot of money.