His humorous closing speech was a welcome addition to the ______dull meeting.
A number of tests have been conducted to _______ that these drugs have no side effects.
Every year, typhoons and losses ______ lead to are frightening though measures have been taken.
The managers discussed the plan that they would like to see __________ the next year.
I can’t thank him too much, ____________ I couldn’t have finished the project in time.
Seeing the happy _______ of the kids playing on the playground, I can’t help thinking of my childhood.