1. They don't allow___the building until they finish___it.
a.entering/renovating
b. to enter /to renovate
c. entering/having renovated
d. to enter/renovate
2. I'd prefer___for the next bus rather than travel on a crowded one because I have difficulty___up for long.
a.waiting/to stand
b. to wait/standing
c. wait/in standing
d. to be waiting/stand
3. Will you stop___with your fingers? I'm trying ___on my work.
a. tapping/concentrating
b. to tap/to concentrating
c. having tapped/concentrated
d. tapping/to concentrate
4. Obsessive people can't help___a particular activity over and over again.
a.having been doing
b. having done
c.doing
d.to do
1. They don't allow___the building until they finish___it.
a.entering/renovating
b. to enter /to renovate
c. entering/having renovated
d. to enter/renovate
2. I'd prefer___for the next bus rather than travel on a crowded one because I have difficulty___up for long.
a.waiting/to stand
b. to wait/standing
c. wait/in standing
d. to be waiting/stand
3. Will you stop___with your fingers? I'm trying ___on my work.
a. tapping/concentrating
b. to tap/to concentrating
c. having tapped/concentrated
d. tapping/to concentrate
4. Obsessive people can't help___a particular activity over and over again.
a.having been doing
b. having done
c.doing
d.to do
1. They don't allow___the building until they finish___it.
a.entering/renovating
b. to enter /to renovate
c. entering/having renovated
d. to enter/renovate
2. I'd prefer___for the next bus rather than travel on a crowded one because I have difficulty___up for long.
a.waiting/to stand
b. to wait/standing
c. wait/in standing
d. to be waiting/stand
3. Will you stop___with your fingers? I'm trying ___on my work.
a. tapping/concentrating
b. to tap/to concentrating
c. having tapped/concentrated
d. tapping/to concentrate
4. Obsessive people can't help___a particular activity over and over again.
a.having been doing
b. having done
c.doing
d.to do
1. They don't allow___the building until they finish___it.
a.entering/renovating
b. to enter /to renovate
c. entering/having renovated
d. to enter/renovate
2. I'd prefer___for the next bus rather than travel on a crowded one because I have difficulty___up for long.
a.waiting/to stand
b. to wait/standing
c. wait/in standing
d. to be waiting/stand
3. Will you stop___with your fingers? I'm trying ___on my work.
a. tapping/concentrating
b. to tap/to concentrating
c. having tapped/concentrated
d. tapping/to concentrate
4. Obsessive people can't help___a particular activity over and over again.
a.having been doing
b. having done
c.doing
d.to do
Remember: help do something / to do something
but can't/ couldn't help doing something