He land the spacecraft _______ the moon together _______ Aldrin. [ ]

Why didn’t you call me this morning?——I ______ call you. I called you all the morning, but I couldn’t ______.

The art exhibition is really worth _______，and you’re sure to learn lot from it.

Would you like an ice­cream，Diane?—No，thanks.I ____ eat them.They’re bad for my teeth.

Here’s a recipe ______ a pizza. [ ]