--What can I do for you?-- If you __________ see Mr. Smith, give him my regards.
It is not ________ it is useful to study nature but he takes pleasure that the scientist study nature.
I used to go camping a lot, so it wasn’t the first time I ______ in a tent.
The song is sung all over the country, ______ it the most popular song this year.
I was ________ leave ________ I saw him ________ towards me with a bag in his hand.
A new bridge will be built just at the place where the old one was ________.