Present Simple, Continuous, Perfect, Perfect Continuous.

The researcher __________a comprehensive study on climate change impacts for years.

• 1. conducts

• is conducting

• has conducted

• has been conducting

1. The committee _____ on the proposal for weeks without reaching a consensus.

• 1. deliberates

• is deliberating

• has deliberated

• has been deliberating

Recently, the artist ________with new techniques to achieve a unique effect in her paintings.

• • experiments

• • is experimenting

• • has experimented

• • has been experimenting

The team _____ the project's progress right now.

• • monitors

• • is monitoring

• has monitored

• • has been monitoring

The scientist _______various hypotheses to explain the unexpected results over the last few days.

• • proposes

• • is proposing

• • has proposed

• • has been proposing

The architect ________innovative designs that integrate sustainability and aesthetics since last year.

• • creates

• • is creating

• • has created

• • has been creating

1. The novelist _____ the intricacies of human relationships all year.

• explores

• is exploring

• has explore

• has been exploring

1. The CEO _____ a new strategy to improve the company’s profitability since the last project.

• • implements

• • is implementing

• • has implemented

• has been implementing

1. The lawyer _____ the case meticulously at the moment.

• • examines

• • is examining

• • has examined

• • has been examining

1. The engineer _____ the system for potential flaws over the past few days.

• • inspects

• • is inspecting

• • has inspected

• • has been inspecting