Process has been very smooth. ______, we are not confident that it will be completed on time.

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

Tonny’s parents thought he was at school，but________he was in a net bar.

It is good for elderly people to be _________ involved in community service.

While reading, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.