英和和英

tackle a task

a painstaking task

a daunting task

work on a task

carry out a task

a burdensome task

Sort tasks

Submit a task

a backbreaking task

a worthwhile topic for discussion

to give a subject for composition

toss off a task

Turn in a task

a subordinate task

an issue that becomes a problem

assign a task to

to undertake a troublesome task

a subject for a prize contest

an elusive problem

an arithmetical problem

a painful task

an involved problem

a complex problem

labor at a task

a vexing problem

to raise a question―give rise to a controversy

pose a problem

to raise a question

a problem for application

the rootedness of the problem