Last night Mr. Crook didn’t come back at the usual time. ______, he met some friends and Stayed out until midnight.

I just keep working hard as I have done, and ________ it will pay off. It has done so far and so I just have to do the same.

. Bob is____ honest boy, and he won’t tell lies.

When it comes to my hobbies, I like rock climbing______ . 

Cloning plants is straightforward while cloning animals is _____________ more complicated.